initial DSTU7624 work

2 files changed, 1125 insertions, 0 deletions

diff --git a/crypto/src/crypto/engines/Dstu7624Engine.cs b/crypto/src/crypto/engines/Dstu7624Engine.cs
new file mode 100644
index 000000000..4699ee5bd
--- /dev/null
+++ b/crypto/src/crypto/engines/Dstu7624Engine.cs
@@ -0,0 +1,862 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Crypto.Engines
+{
+    /**
+    * implementation of DSTU 7624 (Kalyna)
+    */
+    public class Dstu7624Engine
+         : IBlockCipher
+    {
+        private const int BITS_IN_WORD = 64;
+        private const int BITS_IN_BYTE = 8;
+
+        /* Block words size. */
+        private const int kNB_128 = 2;
+        private const int kNB_256 = 4;
+        private const int kNB_512 = 8;
+
+        /* Key words size. */
+        private const int kNK_128 = 2;
+        private const int kNK_256 = 4;
+        private const int kNK_512 = 8;
+
+        /* Block bits size. */
+        private const int kBLOCK_128 = kNB_128 * BITS_IN_WORD;
+        private const int kBLOCK_256 = kNB_256 * BITS_IN_WORD;
+        private const int kBLOCK_512 = kNB_512 * BITS_IN_WORD;
+
+        /* Block bits size. */
+        private const int kKEY_128 = kNK_128 * BITS_IN_WORD;
+        private const int kKEY_256 = kNK_256 * BITS_IN_WORD;
+        private const int kKEY_512 = kNK_512 * BITS_IN_WORD;
+
+        /* Number of enciphering rounds size depending on key length. */
+        private const int kNR_128 = 10;
+        private const int kNR_256 = 14;
+        private const int kNR_512 = 18;
+
+        private const int REDUCTION_POLYNOMIAL = 0x011d;  /* x^8 + x^4 + x^3 + x^2 + 1 */
+
+
+        private int nb;  /* Number of 64-bit words in enciphering block. */
+        private int nk;  /*< Number of 64-bit words in key. */
+        private int roundKeysAmount;  /*< Number of enciphering rounds. */
+
+        private ulong[] internalState = null;  /*< Current cipher state. */
+
+
+        private ulong[] workingKey = null;
+        private ulong[][] roundKeys = null;  /*< Round key computed from enciphering key. */
+
+
+        private int blockSizeBits;
+        private int keySizeBits;
+
+        private bool forEncryption;
+
+
+        public Dstu7624Engine(int blockSizeBits, int keySizeBits)
+        {
+            this.blockSizeBits = blockSizeBits;
+            this.keySizeBits = keySizeBits;
+
+            if (blockSizeBits == kBLOCK_128)
+            {
+                nb = kBLOCK_128 / BITS_IN_WORD;
+                if (keySizeBits == kKEY_128)
+                {
+                    nk = kKEY_128 / BITS_IN_WORD;
+                    roundKeysAmount = kNR_128;
+                }
+                else if (keySizeBits == kKEY_256)
+                {
+                    nk = kKEY_256 / BITS_IN_WORD;
+                    roundKeysAmount = kNR_256;
+                }
+                else
+                {
+                    throw new ArgumentException("Unsupported key size");
+                }
+            }
+            else if (blockSizeBits == 256)
+            {
+                nb = kBLOCK_256 / BITS_IN_WORD;
+                if (keySizeBits == kKEY_256)
+                {
+                    nk = kKEY_256 / BITS_IN_WORD;
+                    roundKeysAmount = kNR_256;
+                }
+                else if (keySizeBits == kKEY_512)
+                {
+                    nk = kKEY_512 / BITS_IN_WORD;
+                    roundKeysAmount = kNR_512;
+                }
+                else
+                {
+                    throw new ArgumentException("Unsupported key size");
+                }
+            }
+            else if (blockSizeBits == kBLOCK_512)
+            {
+                nb = kBLOCK_512 / BITS_IN_WORD;
+                if (keySizeBits == kKEY_512)
+                {
+                    nk = kKEY_512 / BITS_IN_WORD;
+                    roundKeysAmount = kNR_512;
+                }
+                else
+                {
+                    throw new ArgumentException("Unsupported key size");
+                }
+            }
+            else
+            {
+                throw new ArgumentException("Unsupported block size");
+            }
+
+            internalState = new ulong[nb];
+
+            roundKeys = new ulong[roundKeysAmount + 1][];
+
+            for (int i = 0; i < roundKeysAmount + 1; i++)
+            {
+                roundKeys[i] = new ulong[nb];
+            }
+        }
+
+
+
+        #region INITIALIZATION
+        public virtual void Init(bool forEncryption, ICipherParameters parameters)
+        {
+            if (parameters is KeyParameter)
+            {
+                workingKey = BytesToWords(((KeyParameter)parameters).GetKey());
+
+                ulong[] kt = new ulong[nb];
+
+                KeyExpandKT(workingKey, kt);
+
+                KeyExpandEven(workingKey, kt);
+
+                KeyExpandOdd();
+
+            }
+            else if (parameters != null)
+            {
+                throw new ArgumentException("invalid parameter passed to Dstu7624 init - "
+                + Platform.GetTypeName(parameters));
+            }
+
+            this.forEncryption = forEncryption;
+        }
+
+        private void KeyExpandKT(ulong[] key, ulong[] kt)
+        {
+            ulong[] k0 = new ulong[nb];
+            ulong[] k1 = new ulong[nb];
+
+            internalState = new ulong[nb];
+            internalState[0] += (ulong)(nb + nk + 1);
+
+            if (nb == nk)
+            {
+                Array.Copy(key, k0, k0.Length);
+                Array.Copy(key, k1, k1.Length);
+            }
+            else
+            {
+                Array.Copy(key, 0, k0, 0, nb);
+                Array.Copy(key, nb, k1, 0, nb);
+            }
+
+            AddRoundKeyExpand(k0);
+
+            EncryptionRound();
+
+            XorRoundKeyExpand(k1);
+
+            EncryptionRound();
+
+            AddRoundKeyExpand(k0);
+
+            EncryptionRound();
+
+            Array.Copy(internalState, kt, nb);
+        }
+        private void KeyExpandEven(ulong[] key, ulong[] kt)
+        {
+            ulong[] initial_data = new ulong[nk];
+
+            ulong[] kt_round = new ulong[nb];
+
+            ulong[] tmv = new ulong[nb];
+
+            int round = 0;
+
+            Array.Copy(key, initial_data, nk);
+
+            for (int i = 0; i < nb; i++)
+            {
+                tmv[i] = 0x0001000100010001;
+            }
+
+            while (true)
+            {
+                Array.Copy(kt, internalState, nb);
+
+                AddRoundKeyExpand(tmv);
+
+                Array.Copy(internalState, kt_round, nb);
+                Array.Copy(initial_data, internalState, nb);
+
+                AddRoundKeyExpand(kt_round);
+
+                EncryptionRound();
+
+                XorRoundKeyExpand(kt_round);
+
+                EncryptionRound();
+
+                AddRoundKeyExpand(kt_round);
+
+                Array.Copy(internalState, roundKeys[round], nb);
+
+                if (roundKeysAmount == round)
+                {
+                    break;
+                }
+                if (nk != nb)
+                {
+                    round += 2;
+
+                    ShiftLeft(tmv);
+
+                    Array.Copy(kt, internalState, nb);
+
+                    AddRoundKeyExpand(tmv);
+
+                    Array.Copy(internalState, kt_round, nb);
+                    Array.Copy(initial_data, nb, internalState, 0, nb);
+
+                    AddRoundKeyExpand(kt_round);
+
+                    EncryptionRound();
+
+                    XorRoundKeyExpand(kt_round);
+
+                    EncryptionRound();
+
+                    AddRoundKeyExpand(kt_round);
+
+                    Array.Copy(internalState, roundKeys[round], nb);
+
+                    if (roundKeysAmount == round)
+                    {
+                        break;
+                    }
+                }
+
+                round += 2;
+                ShiftLeft(tmv);
+
+                //Rotate initial data array on 1 element left
+                ulong temp = initial_data[0];
+                Array.Copy(initial_data, 1, initial_data, 0, initial_data.Length - 1);
+                initial_data[initial_data.Length - 1] = temp;
+            }
+        }
+        private void KeyExpandOdd()
+        {
+            for (int i = 1; i < roundKeysAmount; i += 2)
+            {
+                Array.Copy(roundKeys[i - 1], roundKeys[i], nb);
+                RotateLeft(roundKeys[i]);
+            }
+        }
+        #endregion
+
+
+        public virtual int ProcessBlock(byte[] input, int inOff, byte[] output, int outOff)
+        {
+            if (workingKey == null)
+                throw new InvalidOperationException("Dstu7624 engine not initialised");
+
+            Check.DataLength(input, inOff, GetBlockSize(), "input buffer too short");
+            Check.OutputLength(output, outOff, GetBlockSize(), "output buffer too short");
+
+            if (forEncryption)
+            {
+                Encrypt(input, inOff, output, outOff);
+            }
+            else
+            {
+                Decrypt(input, inOff, output, outOff);
+            }
+
+            return GetBlockSize();
+        }
+
+        private void Encrypt(byte[] plain, int inOff, byte[] cipherText, int outOff)
+        {
+            int round = 0;
+
+            Array.Copy(plain, inOff, plain, 0, blockSizeBits / BITS_IN_BYTE);
+            Array.Resize(ref plain, blockSizeBits / BITS_IN_BYTE);
+            
+            ulong[] plain_ = BytesToWords(plain);
+
+            Array.Copy(plain_, internalState, nb);
+
+            AddRoundKey(round);
+
+            for (round = 1; round < roundKeysAmount; round++)
+            {
+                EncryptionRound();
+
+                XorRoundKey(round);
+
+            }
+            EncryptionRound();
+
+            AddRoundKey(roundKeysAmount);
+
+            ulong[] cipherText_ = new ulong[internalState.Length];
+
+            Array.Copy(internalState, cipherText_, nb);
+
+            byte[] temp = WordsToBytes(cipherText_);
+
+            Array.Copy(temp, 0, cipherText, outOff, temp.Length);
+
+        }
+        private void Decrypt(byte[] cipherText, int inOff, byte[] decryptedText, int outOff)
+        {
+            Array.Copy(cipherText, inOff, cipherText, 0, blockSizeBits / BITS_IN_BYTE);
+            Array.Resize(ref cipherText, blockSizeBits / BITS_IN_BYTE);
+
+            int round = roundKeysAmount;
+
+            ulong[] cipherText_ = BytesToWords(cipherText);
+
+            Array.Copy(cipherText_, internalState, nb);
+
+            SubRoundKey(round);
+
+            for (round = roundKeysAmount - 1; round > 0; round--)
+            {
+                DecryptionRound();
+                XorRoundKey(round);
+            }
+
+            DecryptionRound();
+            SubRoundKey(0);
+
+            ulong[] decryptedText_ = new ulong[internalState.Length];
+
+            Array.Copy(internalState, decryptedText_, nb);
+
+
+            byte[] temp = WordsToBytes(decryptedText_);
+            Array.Copy(temp, 0, decryptedText, outOff, temp.Length);
+
+            
+        }
+
+
+
+
+
+
+
+
+
+        private void AddRoundKeyExpand(ulong[] value)
+        {
+            for (int i = 0; i < nb; i++)
+            {
+                internalState[i] += value[i];
+            }
+        }
+
+        private void EncryptionRound()
+        {
+            SubBytes();
+            ShiftRows();
+            MixColumns();
+        }
+
+        private void DecryptionRound()
+        {
+            InvMixColumns();
+            InvShiftRows();
+            InvSubBytes();
+        }
+
+        private void RotateLeft(ulong[] state_value)
+        {
+            int rotateBytesLength = 2 * state_value.Length + 3;
+            int bytesLength = state_value.Length * (BITS_IN_WORD / BITS_IN_BYTE);
+
+
+            byte[] bytes = WordsToBytes(state_value);
+            byte[] buffer = new byte[rotateBytesLength];
+
+            Array.Copy(bytes, buffer, rotateBytesLength);
+
+            Buffer.BlockCopy(bytes, rotateBytesLength, bytes, 0, bytesLength - rotateBytesLength);
+
+            Array.Copy(buffer, 0, bytes, bytesLength - rotateBytesLength, rotateBytesLength);
+
+            var temp = BytesToWords(bytes);
+            Array.Copy(temp, state_value, state_value.Length);
+        }
+
+        private void ShiftLeft(ulong[] state_value)
+        {
+            for (int i = 0; i < state_value.Length; i++)
+            {
+                state_value[i] <<= 1;
+            }
+            Array.Reverse(state_value);
+        }
+
+        private void XorRoundKeyExpand(ulong[] value)
+        {
+            for (int i = 0; i < nb; i++)
+            {
+                internalState[i] ^= value[i];
+            }
+        }
+
+        private void XorRoundKey(int round)
+        {
+            for (int i = 0; i < nb; i++)
+            {
+                internalState[i] ^= roundKeys[round][i];
+            }
+        }
+
+        private void ShiftRows()
+        {
+            int row, col;
+            int shift = -1;
+
+            byte[] stateBytes = WordsToBytes(internalState);
+
+            byte[] nstate = new byte[nb * sizeof(ulong)];
+
+            for (row = 0; row < sizeof(ulong); row++)
+            {
+                if (row % (sizeof(ulong) / nb) == 0)
+                {
+                    shift += 1;
+                }
+
+                for (col = 0; col < nb; col++)
+                {
+                    nstate[row + ((col + shift) % nb) * sizeof(ulong)] = stateBytes[row + col * sizeof(ulong)];
+                }
+            }
+
+            internalState = BytesToWords(nstate);
+
+        }
+
+        private void InvShiftRows()
+        {
+            int row, col;
+            int shift = -1;
+
+            byte[] stateBytes = WordsToBytes(internalState);
+            byte[] nstate = new byte[nb * sizeof(ulong)];
+
+            for (row = 0; row < sizeof(ulong); row++)
+            {
+                if (row % (sizeof(ulong) / nb) == 0)
+                {
+                    shift += 1;
+                }
+
+                for (col = 0; col < nb; col++)
+                {
+                    nstate[row + col * sizeof(ulong)] = stateBytes[row + ((col + shift) % nb) * sizeof(ulong)];
+                }
+            }
+
+            internalState = BytesToWords(nstate);
+        }
+
+        private ulong[] BytesToWords(byte[] bytes)
+        {
+            ulong[] words = new ulong[bytes.Length / sizeof(ulong)];
+
+            for (int i = 0; i < words.Length; i++)
+            {
+                words[i] = BitConverter.ToUInt64(bytes, i * sizeof(ulong));
+
+                if (!BitConverter.IsLittleEndian)
+                {
+                    words[i] = ReverseWord(words[i]);
+                }
+            }
+
+            return words;
+        }
+
+        private byte[] WordsToBytes(ulong[] words)
+        {
+            byte[] bytes = new byte[words.Length * sizeof(ulong)];
+
+            byte[] tempBytes = new byte[sizeof(ulong)];
+
+            for (int i = 0; i < words.Length; ++i)
+            {
+                if (!BitConverter.IsLittleEndian)
+                {
+                    words[i] = ReverseWord(words[i]);
+                }
+
+                tempBytes = BitConverter.GetBytes(words[i]);
+                Array.Copy(tempBytes, 0, bytes, i * tempBytes.Length, tempBytes.Length);
+            }
+            return bytes;
+        }
+
+        private ulong ReverseWord(ulong x)
+        {
+            byte[] bytes = BitConverter.GetBytes(x);
+            Array.Reverse(bytes);
+            return BitConverter.ToUInt64(bytes, 0);
+        }
+
+        private void AddRoundKey(int round)
+        {
+            for (int i = 0; i < nb; ++i)
+            {
+                internalState[i] += roundKeys[round][i];
+            }
+        }
+
+        private void SubRoundKey(int round)
+        {
+            for (int i = 0; i < nb; ++i)
+            {
+                internalState[i] -= roundKeys[round][i];
+            }
+        }
+
+        private void MixColumns()
+        {
+            MatrixMultiply(mdsMatrix);
+        }
+
+        private void InvMixColumns()
+        {
+            MatrixMultiply(mdsInvMatrix);
+        }
+
+        private void MatrixMultiply(byte[][] matrix)
+        {
+            int col, row, b;
+            byte product;
+            ulong result;
+            byte[] stateBytes = WordsToBytes(internalState);
+
+            for (col = 0; col < nb; ++col)
+            {
+                result = 0;
+                for (row = sizeof(ulong) - 1; row >= 0; --row)
+                {
+                    product = 0;
+                    for (b = sizeof(ulong) - 1; b >= 0; --b)
+                    {
+                        product ^= MultiplyGF(stateBytes[b + col * sizeof(ulong)], matrix[row][b]);
+                    }
+                    result |= (ulong)product << (row * sizeof(ulong));
+                }
+                internalState[col] = result;
+            }
+        }
+
+        private byte MultiplyGF(byte x, byte y)
+        {
+            byte r = 0;
+            byte hbit = 0;
+
+            for (int i = 0; i < BITS_IN_BYTE; i++)
+            {
+                if ((y & 0x01) == 1)
+                {
+                    r ^= x;
+                }
+
+                hbit = (byte)(x & 0x80);
+
+                x <<= 1;
+
+                if (hbit == 0x80)
+                {
+                    x = (byte)((int)x ^ REDUCTION_POLYNOMIAL);
+                }
+                y >>= 1;
+            }
+            return r;
+        }
+
+        private void SubBytes()
+        {
+            for (int i = 0; i < nb; i++)
+            {
+                internalState[i] = sboxesForEncryption[0][internalState[i] & 0x00000000000000FF] |
+                           ((ulong)sboxesForEncryption[1][(internalState[i] & 0x000000000000FF00) >> 8] << 8) |
+                           ((ulong)sboxesForEncryption[2][(internalState[i] & 0x0000000000FF0000) >> 16] << 16) |
+                           ((ulong)sboxesForEncryption[3][(internalState[i] & 0x00000000FF000000) >> 24] << 24) |
+                           ((ulong)sboxesForEncryption[0][(internalState[i] & 0x000000FF00000000) >> 32] << 32) |
+                           ((ulong)sboxesForEncryption[1][(internalState[i] & 0x0000FF0000000000) >> 40] << 40) |
+                           ((ulong)sboxesForEncryption[2][(internalState[i] & 0x00FF000000000000) >> 48] << 48) |
+                           ((ulong)sboxesForEncryption[3][(internalState[i] & 0xFF00000000000000) >> 56] << 56);
+            }
+        }
+
+        private void InvSubBytes()
+        {
+            for (int i = 0; i < nb; i++)
+            {
+                internalState[i] = sboxesForDecryption[0][internalState[i] & 0x00000000000000FF] |
+                           ((ulong)sboxesForDecryption[1][(internalState[i] & 0x000000000000FF00) >> 8] << 8) |
+                           ((ulong)sboxesForDecryption[2][(internalState[i] & 0x0000000000FF0000) >> 16] << 16) |
+                           ((ulong)sboxesForDecryption[3][(internalState[i] & 0x00000000FF000000) >> 24] << 24) |
+                           ((ulong)sboxesForDecryption[0][(internalState[i] & 0x000000FF00000000) >> 32] << 32) |
+                           ((ulong)sboxesForDecryption[1][(internalState[i] & 0x0000FF0000000000) >> 40] << 40) |
+                           ((ulong)sboxesForDecryption[2][(internalState[i] & 0x00FF000000000000) >> 48] << 48) |
+                           ((ulong)sboxesForDecryption[3][(internalState[i] & 0xFF00000000000000) >> 56] << 56);
+            }
+        }
+
+
+        #region TABLES AND S-BOXES
+
+        private byte[][] mdsMatrix = 
+          {
+               new byte[] { 0x01, 0x01, 0x05, 0x01, 0x08, 0x06, 0x07, 0x04 },
+               new byte[] { 0x04, 0x01, 0x01, 0x05, 0x01, 0x08, 0x06, 0x07 },
+               new byte[] { 0x07, 0x04, 0x01, 0x01, 0x05, 0x01, 0x08, 0x06 },
+               new byte[] { 0x06, 0x07, 0x04, 0x01, 0x01, 0x05, 0x01, 0x08 },
+               new byte[] { 0x08, 0x06, 0x07, 0x04, 0x01, 0x01, 0x05, 0x01 },
+               new byte[] { 0x01, 0x08, 0x06, 0x07, 0x04, 0x01, 0x01, 0x05 },
+               new byte[] { 0x05, 0x01, 0x08, 0x06, 0x07, 0x04, 0x01, 0x01 },
+               new byte[] { 0x01, 0x05, 0x01, 0x08, 0x06, 0x07, 0x04, 0x01 },
+          };
+
+        private byte[][] mdsInvMatrix = 
+          {
+               new byte[] { 0xAD, 0x95, 0x76, 0xA8, 0x2F, 0x49, 0xD7, 0xCA },
+               new byte[] { 0xCA, 0xAD, 0x95, 0x76, 0xA8, 0x2F, 0x49, 0xD7 },
+               new byte[] { 0xD7, 0xCA, 0xAD, 0x95, 0x76, 0xA8, 0x2F, 0x49 },
+               new byte[] { 0x49, 0xD7, 0xCA, 0xAD, 0x95, 0x76, 0xA8, 0x2F },
+               new byte[] { 0x2F, 0x49, 0xD7, 0xCA, 0xAD, 0x95, 0x76, 0xA8 },
+               new byte[] { 0xA8, 0x2F, 0x49, 0xD7, 0xCA, 0xAD, 0x95, 0x76 },
+               new byte[] { 0x76, 0xA8, 0x2F, 0x49, 0xD7, 0xCA, 0xAD, 0x95 },
+               new byte[] { 0x95, 0x76, 0xA8, 0x2F, 0x49, 0xD7, 0xCA, 0xAD },
+          };
+
+
+        private byte[][] sboxesForEncryption = 
+          {
+               new byte[]
+               {
+                    0xa8, 0x43, 0x5f, 0x06, 0x6b, 0x75, 0x6c, 0x59, 0x71, 0xdf, 0x87, 0x95, 0x17, 0xf0, 0xd8, 0x09, 
+                    0x6d, 0xf3, 0x1d, 0xcb, 0xc9, 0x4d, 0x2c, 0xaf, 0x79, 0xe0, 0x97, 0xfd, 0x6f, 0x4b, 0x45, 0x39, 
+                    0x3e, 0xdd, 0xa3, 0x4f, 0xb4, 0xb6, 0x9a, 0x0e, 0x1f, 0xbf, 0x15, 0xe1, 0x49, 0xd2, 0x93, 0xc6, 
+                    0x92, 0x72, 0x9e, 0x61, 0xd1, 0x63, 0xfa, 0xee, 0xf4, 0x19, 0xd5, 0xad, 0x58, 0xa4, 0xbb, 0xa1, 
+                    0xdc, 0xf2, 0x83, 0x37, 0x42, 0xe4, 0x7a, 0x32, 0x9c, 0xcc, 0xab, 0x4a, 0x8f, 0x6e, 0x04, 0x27, 
+                    0x2e, 0xe7, 0xe2, 0x5a, 0x96, 0x16, 0x23, 0x2b, 0xc2, 0x65, 0x66, 0x0f, 0xbc, 0xa9, 0x47, 0x41, 
+                    0x34, 0x48, 0xfc, 0xb7, 0x6a, 0x88, 0xa5, 0x53, 0x86, 0xf9, 0x5b, 0xdb, 0x38, 0x7b, 0xc3, 0x1e, 
+                    0x22, 0x33, 0x24, 0x28, 0x36, 0xc7, 0xb2, 0x3b, 0x8e, 0x77, 0xba, 0xf5, 0x14, 0x9f, 0x08, 0x55, 
+                    0x9b, 0x4c, 0xfe, 0x60, 0x5c, 0xda, 0x18, 0x46, 0xcd, 0x7d, 0x21, 0xb0, 0x3f, 0x1b, 0x89, 0xff, 
+                    0xeb, 0x84, 0x69, 0x3a, 0x9d, 0xd7, 0xd3, 0x70, 0x67, 0x40, 0xb5, 0xde, 0x5d, 0x30, 0x91, 0xb1, 
+                    0x78, 0x11, 0x01, 0xe5, 0x00, 0x68, 0x98, 0xa0, 0xc5, 0x02, 0xa6, 0x74, 0x2d, 0x0b, 0xa2, 0x76, 
+                    0xb3, 0xbe, 0xce, 0xbd, 0xae, 0xe9, 0x8a, 0x31, 0x1c, 0xec, 0xf1, 0x99, 0x94, 0xaa, 0xf6, 0x26, 
+                    0x2f, 0xef, 0xe8, 0x8c, 0x35, 0x03, 0xd4, 0x7f, 0xfb, 0x05, 0xc1, 0x5e, 0x90, 0x20, 0x3d, 0x82, 
+                    0xf7, 0xea, 0x0a, 0x0d, 0x7e, 0xf8, 0x50, 0x1a, 0xc4, 0x07, 0x57, 0xb8, 0x3c, 0x62, 0xe3, 0xc8, 
+                    0xac, 0x52, 0x64, 0x10, 0xd0, 0xd9, 0x13, 0x0c, 0x12, 0x29, 0x51, 0xb9, 0xcf, 0xd6, 0x73, 0x8d, 
+                    0x81, 0x54, 0xc0, 0xed, 0x4e, 0x44, 0xa7, 0x2a, 0x85, 0x25, 0xe6, 0xca, 0x7c, 0x8b, 0x56, 0x80 
+               },
+
+               new byte[]
+               {
+                    0xce, 0xbb, 0xeb, 0x92, 0xea, 0xcb, 0x13, 0xc1, 0xe9, 0x3a, 0xd6, 0xb2, 0xd2, 0x90, 0x17, 0xf8, 
+                    0x42, 0x15, 0x56, 0xb4, 0x65, 0x1c, 0x88, 0x43, 0xc5, 0x5c, 0x36, 0xba, 0xf5, 0x57, 0x67, 0x8d, 
+                    0x31, 0xf6, 0x64, 0x58, 0x9e, 0xf4, 0x22, 0xaa, 0x75, 0x0f, 0x02, 0xb1, 0xdf, 0x6d, 0x73, 0x4d, 
+                    0x7c, 0x26, 0x2e, 0xf7, 0x08, 0x5d, 0x44, 0x3e, 0x9f, 0x14, 0xc8, 0xae, 0x54, 0x10, 0xd8, 0xbc, 
+                    0x1a, 0x6b, 0x69, 0xf3, 0xbd, 0x33, 0xab, 0xfa, 0xd1, 0x9b, 0x68, 0x4e, 0x16, 0x95, 0x91, 0xee, 
+                    0x4c, 0x63, 0x8e, 0x5b, 0xcc, 0x3c, 0x19, 0xa1, 0x81, 0x49, 0x7b, 0xd9, 0x6f, 0x37, 0x60, 0xca, 
+                    0xe7, 0x2b, 0x48, 0xfd, 0x96, 0x45, 0xfc, 0x41, 0x12, 0x0d, 0x79, 0xe5, 0x89, 0x8c, 0xe3, 0x20, 
+                    0x30, 0xdc, 0xb7, 0x6c, 0x4a, 0xb5, 0x3f, 0x97, 0xd4, 0x62, 0x2d, 0x06, 0xa4, 0xa5, 0x83, 0x5f, 
+                    0x2a, 0xda, 0xc9, 0x00, 0x7e, 0xa2, 0x55, 0xbf, 0x11, 0xd5, 0x9c, 0xcf, 0x0e, 0x0a, 0x3d, 0x51, 
+                    0x7d, 0x93, 0x1b, 0xfe, 0xc4, 0x47, 0x09, 0x86, 0x0b, 0x8f, 0x9d, 0x6a, 0x07, 0xb9, 0xb0, 0x98, 
+                    0x18, 0x32, 0x71, 0x4b, 0xef, 0x3b, 0x70, 0xa0, 0xe4, 0x40, 0xff, 0xc3, 0xa9, 0xe6, 0x78, 0xf9, 
+                    0x8b, 0x46, 0x80, 0x1e, 0x38, 0xe1, 0xb8, 0xa8, 0xe0, 0x0c, 0x23, 0x76, 0x1d, 0x25, 0x24, 0x05, 
+                    0xf1, 0x6e, 0x94, 0x28, 0x9a, 0x84, 0xe8, 0xa3, 0x4f, 0x77, 0xd3, 0x85, 0xe2, 0x52, 0xf2, 0x82, 
+                    0x50, 0x7a, 0x2f, 0x74, 0x53, 0xb3, 0x61, 0xaf, 0x39, 0x35, 0xde, 0xcd, 0x1f, 0x99, 0xac, 0xad, 
+                    0x72, 0x2c, 0xdd, 0xd0, 0x87, 0xbe, 0x5e, 0xa6, 0xec, 0x04, 0xc6, 0x03, 0x34, 0xfb, 0xdb, 0x59, 
+                    0xb6, 0xc2, 0x01, 0xf0, 0x5a, 0xed, 0xa7, 0x66, 0x21, 0x7f, 0x8a, 0x27, 0xc7, 0xc0, 0x29, 0xd7 
+               },
+
+               new byte[]
+               {
+                    0x93, 0xd9, 0x9a, 0xb5, 0x98, 0x22, 0x45, 0xfc, 0xba, 0x6a, 0xdf, 0x02, 0x9f, 0xdc, 0x51, 0x59, 
+                    0x4a, 0x17, 0x2b, 0xc2, 0x94, 0xf4, 0xbb, 0xa3, 0x62, 0xe4, 0x71, 0xd4, 0xcd, 0x70, 0x16, 0xe1, 
+                    0x49, 0x3c, 0xc0, 0xd8, 0x5c, 0x9b, 0xad, 0x85, 0x53, 0xa1, 0x7a, 0xc8, 0x2d, 0xe0, 0xd1, 0x72, 
+                    0xa6, 0x2c, 0xc4, 0xe3, 0x76, 0x78, 0xb7, 0xb4, 0x09, 0x3b, 0x0e, 0x41, 0x4c, 0xde, 0xb2, 0x90, 
+                    0x25, 0xa5, 0xd7, 0x03, 0x11, 0x00, 0xc3, 0x2e, 0x92, 0xef, 0x4e, 0x12, 0x9d, 0x7d, 0xcb, 0x35, 
+                    0x10, 0xd5, 0x4f, 0x9e, 0x4d, 0xa9, 0x55, 0xc6, 0xd0, 0x7b, 0x18, 0x97, 0xd3, 0x36, 0xe6, 0x48, 
+                    0x56, 0x81, 0x8f, 0x77, 0xcc, 0x9c, 0xb9, 0xe2, 0xac, 0xb8, 0x2f, 0x15, 0xa4, 0x7c, 0xda, 0x38, 
+                    0x1e, 0x0b, 0x05, 0xd6, 0x14, 0x6e, 0x6c, 0x7e, 0x66, 0xfd, 0xb1, 0xe5, 0x60, 0xaf, 0x5e, 0x33, 
+                    0x87, 0xc9, 0xf0, 0x5d, 0x6d, 0x3f, 0x88, 0x8d, 0xc7, 0xf7, 0x1d, 0xe9, 0xec, 0xed, 0x80, 0x29, 
+                    0x27, 0xcf, 0x99, 0xa8, 0x50, 0x0f, 0x37, 0x24, 0x28, 0x30, 0x95, 0xd2, 0x3e, 0x5b, 0x40, 0x83, 
+                    0xb3, 0x69, 0x57, 0x1f, 0x07, 0x1c, 0x8a, 0xbc, 0x20, 0xeb, 0xce, 0x8e, 0xab, 0xee, 0x31, 0xa2, 
+                    0x73, 0xf9, 0xca, 0x3a, 0x1a, 0xfb, 0x0d, 0xc1, 0xfe, 0xfa, 0xf2, 0x6f, 0xbd, 0x96, 0xdd, 0x43, 
+                    0x52, 0xb6, 0x08, 0xf3, 0xae, 0xbe, 0x19, 0x89, 0x32, 0x26, 0xb0, 0xea, 0x4b, 0x64, 0x84, 0x82, 
+                    0x6b, 0xf5, 0x79, 0xbf, 0x01, 0x5f, 0x75, 0x63, 0x1b, 0x23, 0x3d, 0x68, 0x2a, 0x65, 0xe8, 0x91, 
+                    0xf6, 0xff, 0x13, 0x58, 0xf1, 0x47, 0x0a, 0x7f, 0xc5, 0xa7, 0xe7, 0x61, 0x5a, 0x06, 0x46, 0x44, 
+                    0x42, 0x04, 0xa0, 0xdb, 0x39, 0x86, 0x54, 0xaa, 0x8c, 0x34, 0x21, 0x8b, 0xf8, 0x0c, 0x74, 0x67 
+               },
+
+               new byte[]
+               {
+                    0x68, 0x8d, 0xca, 0x4d, 0x73, 0x4b, 0x4e, 0x2a, 0xd4, 0x52, 0x26, 0xb3, 0x54, 0x1e, 0x19, 0x1f, 
+                    0x22, 0x03, 0x46, 0x3d, 0x2d, 0x4a, 0x53, 0x83, 0x13, 0x8a, 0xb7, 0xd5, 0x25, 0x79, 0xf5, 0xbd, 
+                    0x58, 0x2f, 0x0d, 0x02, 0xed, 0x51, 0x9e, 0x11, 0xf2, 0x3e, 0x55, 0x5e, 0xd1, 0x16, 0x3c, 0x66, 
+                    0x70, 0x5d, 0xf3, 0x45, 0x40, 0xcc, 0xe8, 0x94, 0x56, 0x08, 0xce, 0x1a, 0x3a, 0xd2, 0xe1, 0xdf, 
+                    0xb5, 0x38, 0x6e, 0x0e, 0xe5, 0xf4, 0xf9, 0x86, 0xe9, 0x4f, 0xd6, 0x85, 0x23, 0xcf, 0x32, 0x99, 
+                    0x31, 0x14, 0xae, 0xee, 0xc8, 0x48, 0xd3, 0x30, 0xa1, 0x92, 0x41, 0xb1, 0x18, 0xc4, 0x2c, 0x71, 
+                    0x72, 0x44, 0x15, 0xfd, 0x37, 0xbe, 0x5f, 0xaa, 0x9b, 0x88, 0xd8, 0xab, 0x89, 0x9c, 0xfa, 0x60, 
+                    0xea, 0xbc, 0x62, 0x0c, 0x24, 0xa6, 0xa8, 0xec, 0x67, 0x20, 0xdb, 0x7c, 0x28, 0xdd, 0xac, 0x5b, 
+                    0x34, 0x7e, 0x10, 0xf1, 0x7b, 0x8f, 0x63, 0xa0, 0x05, 0x9a, 0x43, 0x77, 0x21, 0xbf, 0x27, 0x09, 
+                    0xc3, 0x9f, 0xb6, 0xd7, 0x29, 0xc2, 0xeb, 0xc0, 0xa4, 0x8b, 0x8c, 0x1d, 0xfb, 0xff, 0xc1, 0xb2, 
+                    0x97, 0x2e, 0xf8, 0x65, 0xf6, 0x75, 0x07, 0x04, 0x49, 0x33, 0xe4, 0xd9, 0xb9, 0xd0, 0x42, 0xc7, 
+                    0x6c, 0x90, 0x00, 0x8e, 0x6f, 0x50, 0x01, 0xc5, 0xda, 0x47, 0x3f, 0xcd, 0x69, 0xa2, 0xe2, 0x7a, 
+                    0xa7, 0xc6, 0x93, 0x0f, 0x0a, 0x06, 0xe6, 0x2b, 0x96, 0xa3, 0x1c, 0xaf, 0x6a, 0x12, 0x84, 0x39, 
+                    0xe7, 0xb0, 0x82, 0xf7, 0xfe, 0x9d, 0x87, 0x5c, 0x81, 0x35, 0xde, 0xb4, 0xa5, 0xfc, 0x80, 0xef, 
+                    0xcb, 0xbb, 0x6b, 0x76, 0xba, 0x5a, 0x7d, 0x78, 0x0b, 0x95, 0xe3, 0xad, 0x74, 0x98, 0x3b, 0x36, 
+                    0x64, 0x6d, 0xdc, 0xf0, 0x59, 0xa9, 0x4c, 0x17, 0x7f, 0x91, 0xb8, 0xc9, 0x57, 0x1b, 0xe0, 0x61 
+               }
+
+          };
+
+
+        private byte[][] sboxesForDecryption = 
+          {
+               new byte[]
+               {
+	               0xa4, 0xa2, 0xa9, 0xc5, 0x4e, 0xc9, 0x03, 0xd9, 0x7e, 0x0f, 0xd2, 0xad, 0xe7, 0xd3, 0x27, 0x5b, 
+	               0xe3, 0xa1, 0xe8, 0xe6, 0x7c, 0x2a, 0x55, 0x0c, 0x86, 0x39, 0xd7, 0x8d, 0xb8, 0x12, 0x6f, 0x28, 
+	               0xcd, 0x8a, 0x70, 0x56, 0x72, 0xf9, 0xbf, 0x4f, 0x73, 0xe9, 0xf7, 0x57, 0x16, 0xac, 0x50, 0xc0, 
+	               0x9d, 0xb7, 0x47, 0x71, 0x60, 0xc4, 0x74, 0x43, 0x6c, 0x1f, 0x93, 0x77, 0xdc, 0xce, 0x20, 0x8c, 
+	               0x99, 0x5f, 0x44, 0x01, 0xf5, 0x1e, 0x87, 0x5e, 0x61, 0x2c, 0x4b, 0x1d, 0x81, 0x15, 0xf4, 0x23, 
+	               0xd6, 0xea, 0xe1, 0x67, 0xf1, 0x7f, 0xfe, 0xda, 0x3c, 0x07, 0x53, 0x6a, 0x84, 0x9c, 0xcb, 0x02, 
+	               0x83, 0x33, 0xdd, 0x35, 0xe2, 0x59, 0x5a, 0x98, 0xa5, 0x92, 0x64, 0x04, 0x06, 0x10, 0x4d, 0x1c, 
+	               0x97, 0x08, 0x31, 0xee, 0xab, 0x05, 0xaf, 0x79, 0xa0, 0x18, 0x46, 0x6d, 0xfc, 0x89, 0xd4, 0xc7, 
+	               0xff, 0xf0, 0xcf, 0x42, 0x91, 0xf8, 0x68, 0x0a, 0x65, 0x8e, 0xb6, 0xfd, 0xc3, 0xef, 0x78, 0x4c, 
+	               0xcc, 0x9e, 0x30, 0x2e, 0xbc, 0x0b, 0x54, 0x1a, 0xa6, 0xbb, 0x26, 0x80, 0x48, 0x94, 0x32, 0x7d, 
+	               0xa7, 0x3f, 0xae, 0x22, 0x3d, 0x66, 0xaa, 0xf6, 0x00, 0x5d, 0xbd, 0x4a, 0xe0, 0x3b, 0xb4, 0x17, 
+	               0x8b, 0x9f, 0x76, 0xb0, 0x24, 0x9a, 0x25, 0x63, 0xdb, 0xeb, 0x7a, 0x3e, 0x5c, 0xb3, 0xb1, 0x29, 
+	               0xf2, 0xca, 0x58, 0x6e, 0xd8, 0xa8, 0x2f, 0x75, 0xdf, 0x14, 0xfb, 0x13, 0x49, 0x88, 0xb2, 0xec, 
+	               0xe4, 0x34, 0x2d, 0x96, 0xc6, 0x3a, 0xed, 0x95, 0x0e, 0xe5, 0x85, 0x6b, 0x40, 0x21, 0x9b, 0x09, 
+	               0x19, 0x2b, 0x52, 0xde, 0x45, 0xa3, 0xfa, 0x51, 0xc2, 0xb5, 0xd1, 0x90, 0xb9, 0xf3, 0x37, 0xc1, 
+	               0x0d, 0xba, 0x41, 0x11, 0x38, 0x7b, 0xbe, 0xd0, 0xd5, 0x69, 0x36, 0xc8, 0x62, 0x1b, 0x82, 0x8f
+               },
+
+               new byte[]
+               {
+                    0x83, 0xf2, 0x2a, 0xeb, 0xe9, 0xbf, 0x7b, 0x9c, 0x34, 0x96, 0x8d, 0x98, 0xb9, 0x69, 0x8c, 0x29, 
+                    0x3d, 0x88, 0x68, 0x06, 0x39, 0x11, 0x4c, 0x0e, 0xa0, 0x56, 0x40, 0x92, 0x15, 0xbc, 0xb3, 0xdc, 
+                    0x6f, 0xf8, 0x26, 0xba, 0xbe, 0xbd, 0x31, 0xfb, 0xc3, 0xfe, 0x80, 0x61, 0xe1, 0x7a, 0x32, 0xd2, 
+                    0x70, 0x20, 0xa1, 0x45, 0xec, 0xd9, 0x1a, 0x5d, 0xb4, 0xd8, 0x09, 0xa5, 0x55, 0x8e, 0x37, 0x76, 
+                    0xa9, 0x67, 0x10, 0x17, 0x36, 0x65, 0xb1, 0x95, 0x62, 0x59, 0x74, 0xa3, 0x50, 0x2f, 0x4b, 0xc8, 
+                    0xd0, 0x8f, 0xcd, 0xd4, 0x3c, 0x86, 0x12, 0x1d, 0x23, 0xef, 0xf4, 0x53, 0x19, 0x35, 0xe6, 0x7f, 
+                    0x5e, 0xd6, 0x79, 0x51, 0x22, 0x14, 0xf7, 0x1e, 0x4a, 0x42, 0x9b, 0x41, 0x73, 0x2d, 0xc1, 0x5c, 
+                    0xa6, 0xa2, 0xe0, 0x2e, 0xd3, 0x28, 0xbb, 0xc9, 0xae, 0x6a, 0xd1, 0x5a, 0x30, 0x90, 0x84, 0xf9, 
+                    0xb2, 0x58, 0xcf, 0x7e, 0xc5, 0xcb, 0x97, 0xe4, 0x16, 0x6c, 0xfa, 0xb0, 0x6d, 0x1f, 0x52, 0x99, 
+                    0x0d, 0x4e, 0x03, 0x91, 0xc2, 0x4d, 0x64, 0x77, 0x9f, 0xdd, 0xc4, 0x49, 0x8a, 0x9a, 0x24, 0x38, 
+                    0xa7, 0x57, 0x85, 0xc7, 0x7c, 0x7d, 0xe7, 0xf6, 0xb7, 0xac, 0x27, 0x46, 0xde, 0xdf, 0x3b, 0xd7, 
+                    0x9e, 0x2b, 0x0b, 0xd5, 0x13, 0x75, 0xf0, 0x72, 0xb6, 0x9d, 0x1b, 0x01, 0x3f, 0x44, 0xe5, 0x87, 
+                    0xfd, 0x07, 0xf1, 0xab, 0x94, 0x18, 0xea, 0xfc, 0x3a, 0x82, 0x5f, 0x05, 0x54, 0xdb, 0x00, 0x8b, 
+                    0xe3, 0x48, 0x0c, 0xca, 0x78, 0x89, 0x0a, 0xff, 0x3e, 0x5b, 0x81, 0xee, 0x71, 0xe2, 0xda, 0x2c, 
+                    0xb8, 0xb5, 0xcc, 0x6e, 0xa8, 0x6b, 0xad, 0x60, 0xc6, 0x08, 0x04, 0x02, 0xe8, 0xf5, 0x4f, 0xa4, 
+                    0xf3, 0xc0, 0xce, 0x43, 0x25, 0x1c, 0x21, 0x33, 0x0f, 0xaf, 0x47, 0xed, 0x66, 0x63, 0x93, 0xaa
+               },
+
+               new byte[]
+               {
+                    0x45, 0xd4, 0x0b, 0x43, 0xf1, 0x72, 0xed, 0xa4, 0xc2, 0x38, 0xe6, 0x71, 0xfd, 0xb6, 0x3a, 0x95, 
+                    0x50, 0x44, 0x4b, 0xe2, 0x74, 0x6b, 0x1e, 0x11, 0x5a, 0xc6, 0xb4, 0xd8, 0xa5, 0x8a, 0x70, 0xa3, 
+                    0xa8, 0xfa, 0x05, 0xd9, 0x97, 0x40, 0xc9, 0x90, 0x98, 0x8f, 0xdc, 0x12, 0x31, 0x2c, 0x47, 0x6a, 
+                    0x99, 0xae, 0xc8, 0x7f, 0xf9, 0x4f, 0x5d, 0x96, 0x6f, 0xf4, 0xb3, 0x39, 0x21, 0xda, 0x9c, 0x85, 
+                    0x9e, 0x3b, 0xf0, 0xbf, 0xef, 0x06, 0xee, 0xe5, 0x5f, 0x20, 0x10, 0xcc, 0x3c, 0x54, 0x4a, 0x52, 
+                    0x94, 0x0e, 0xc0, 0x28, 0xf6, 0x56, 0x60, 0xa2, 0xe3, 0x0f, 0xec, 0x9d, 0x24, 0x83, 0x7e, 0xd5, 
+                    0x7c, 0xeb, 0x18, 0xd7, 0xcd, 0xdd, 0x78, 0xff, 0xdb, 0xa1, 0x09, 0xd0, 0x76, 0x84, 0x75, 0xbb, 
+                    0x1d, 0x1a, 0x2f, 0xb0, 0xfe, 0xd6, 0x34, 0x63, 0x35, 0xd2, 0x2a, 0x59, 0x6d, 0x4d, 0x77, 0xe7, 
+                    0x8e, 0x61, 0xcf, 0x9f, 0xce, 0x27, 0xf5, 0x80, 0x86, 0xc7, 0xa6, 0xfb, 0xf8, 0x87, 0xab, 0x62, 
+                    0x3f, 0xdf, 0x48, 0x00, 0x14, 0x9a, 0xbd, 0x5b, 0x04, 0x92, 0x02, 0x25, 0x65, 0x4c, 0x53, 0x0c, 
+                    0xf2, 0x29, 0xaf, 0x17, 0x6c, 0x41, 0x30, 0xe9, 0x93, 0x55, 0xf7, 0xac, 0x68, 0x26, 0xc4, 0x7d, 
+                    0xca, 0x7a, 0x3e, 0xa0, 0x37, 0x03, 0xc1, 0x36, 0x69, 0x66, 0x08, 0x16, 0xa7, 0xbc, 0xc5, 0xd3, 
+                    0x22, 0xb7, 0x13, 0x46, 0x32, 0xe8, 0x57, 0x88, 0x2b, 0x81, 0xb2, 0x4e, 0x64, 0x1c, 0xaa, 0x91, 
+                    0x58, 0x2e, 0x9b, 0x5c, 0x1b, 0x51, 0x73, 0x42, 0x23, 0x01, 0x6e, 0xf3, 0x0d, 0xbe, 0x3d, 0x0a, 
+                    0x2d, 0x1f, 0x67, 0x33, 0x19, 0x7b, 0x5e, 0xea, 0xde, 0x8b, 0xcb, 0xa9, 0x8c, 0x8d, 0xad, 0x49, 
+                    0x82, 0xe4, 0xba, 0xc3, 0x15, 0xd1, 0xe0, 0x89, 0xfc, 0xb1, 0xb9, 0xb5, 0x07, 0x79, 0xb8, 0xe1
+               },
+
+               new byte[]
+               {
+                    0xb2, 0xb6, 0x23, 0x11, 0xa7, 0x88, 0xc5, 0xa6, 0x39, 0x8f, 0xc4, 0xe8, 0x73, 0x22, 0x43, 0xc3, 
+                    0x82, 0x27, 0xcd, 0x18, 0x51, 0x62, 0x2d, 0xf7, 0x5c, 0x0e, 0x3b, 0xfd, 0xca, 0x9b, 0x0d, 0x0f, 
+                    0x79, 0x8c, 0x10, 0x4c, 0x74, 0x1c, 0x0a, 0x8e, 0x7c, 0x94, 0x07, 0xc7, 0x5e, 0x14, 0xa1, 0x21, 
+                    0x57, 0x50, 0x4e, 0xa9, 0x80, 0xd9, 0xef, 0x64, 0x41, 0xcf, 0x3c, 0xee, 0x2e, 0x13, 0x29, 0xba, 
+                    0x34, 0x5a, 0xae, 0x8a, 0x61, 0x33, 0x12, 0xb9, 0x55, 0xa8, 0x15, 0x05, 0xf6, 0x03, 0x06, 0x49, 
+                    0xb5, 0x25, 0x09, 0x16, 0x0c, 0x2a, 0x38, 0xfc, 0x20, 0xf4, 0xe5, 0x7f, 0xd7, 0x31, 0x2b, 0x66, 
+                    0x6f, 0xff, 0x72, 0x86, 0xf0, 0xa3, 0x2f, 0x78, 0x00, 0xbc, 0xcc, 0xe2, 0xb0, 0xf1, 0x42, 0xb4, 
+                    0x30, 0x5f, 0x60, 0x04, 0xec, 0xa5, 0xe3, 0x8b, 0xe7, 0x1d, 0xbf, 0x84, 0x7b, 0xe6, 0x81, 0xf8, 
+                    0xde, 0xd8, 0xd2, 0x17, 0xce, 0x4b, 0x47, 0xd6, 0x69, 0x6c, 0x19, 0x99, 0x9a, 0x01, 0xb3, 0x85, 
+                    0xb1, 0xf9, 0x59, 0xc2, 0x37, 0xe9, 0xc8, 0xa0, 0xed, 0x4f, 0x89, 0x68, 0x6d, 0xd5, 0x26, 0x91, 
+                    0x87, 0x58, 0xbd, 0xc9, 0x98, 0xdc, 0x75, 0xc0, 0x76, 0xf5, 0x67, 0x6b, 0x7e, 0xeb, 0x52, 0xcb, 
+                    0xd1, 0x5b, 0x9f, 0x0b, 0xdb, 0x40, 0x92, 0x1a, 0xfa, 0xac, 0xe4, 0xe1, 0x71, 0x1f, 0x65, 0x8d, 
+                    0x97, 0x9e, 0x95, 0x90, 0x5d, 0xb7, 0xc1, 0xaf, 0x54, 0xfb, 0x02, 0xe0, 0x35, 0xbb, 0x3a, 0x4d, 
+                    0xad, 0x2c, 0x3d, 0x56, 0x08, 0x1b, 0x4a, 0x93, 0x6a, 0xab, 0xb8, 0x7a, 0xf2, 0x7d, 0xda, 0x3f, 
+                    0xfe, 0x3e, 0xbe, 0xea, 0xaa, 0x44, 0xc6, 0xd0, 0x36, 0x48, 0x70, 0x96, 0x77, 0x24, 0x53, 0xdf, 
+                    0xf3, 0x83, 0x28, 0x32, 0x45, 0x1e, 0xa4, 0xd3, 0xa2, 0x46, 0x6e, 0x9c, 0xdd, 0x63, 0xd4, 0x9d
+               }
+          };
+        #endregion
+
+
+
+        public virtual string AlgorithmName
+        {
+            get { return "Dstu7624"; }
+        }
+
+        public virtual int GetBlockSize()
+        {
+            return blockSizeBits / BITS_IN_BYTE;
+        }
+
+        public virtual bool IsPartialBlockOkay
+        {
+            get { return false; }
+        }
+
+        public virtual void Reset()
+        {
+
+        }
+
+    }
+}
diff --git a/crypto/src/crypto/engines/Dstu7624WrapEngine.cs b/crypto/src/crypto/engines/Dstu7624WrapEngine.cs
new file mode 100644
index 000000000..bfe8d9c1c
--- /dev/null
+++ b/crypto/src/crypto/engines/Dstu7624WrapEngine.cs
@@ -0,0 +1,263 @@
+using System;
+
+using Org.BouncyCastle.Crypto.Parameters;
+using System.Collections.Generic;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Crypto.Engines
+{
+     public class Dstu7624WrapEngine : IWrapper 
+     {
+          private const int BYTES_IN_INTEGER = 4;
+
+          private KeyParameter param;
+          private Dstu7624Engine engine;
+          private bool forWrapping;
+          private int blockSize;
+
+          private byte[] buffer;
+          private byte[] intArray;
+
+          private readonly byte[] checkSumArray, zeroArray;
+
+
+          public Dstu7624WrapEngine(int blockSizeBits, int keySizeBits)
+          {
+               engine = new Dstu7624Engine(blockSizeBits, keySizeBits);
+               param = null;
+           
+               blockSize = blockSizeBits / 8;
+               buffer = new byte[blockSize];
+               
+               intArray = new byte[BYTES_IN_INTEGER];
+
+               checkSumArray = new byte[blockSize];
+               zeroArray = new byte[blockSize];
+          }
+          
+
+          public string AlgorithmName
+          {
+               get { return "Dstu7624WrapEngine"; }
+          }
+
+          public void Init(bool forWrapping, ICipherParameters parameters)
+          {
+               this.forWrapping = forWrapping;
+                            
+               if (parameters is KeyParameter)
+               {
+                    this.param = (KeyParameter)parameters;
+
+                    engine.Init(forWrapping, param);
+               }
+               else
+               {
+                    throw new ArgumentException("Bad parameters passed to Dstu7624WrapEngine");
+               }
+          }
+
+          public byte[] Wrap(byte[] input, int inOff, int length)
+          {
+               if (!forWrapping)
+               {
+                    throw new InvalidOperationException("Not set for wrapping");
+               }
+
+               if ((input.Length - inOff) % blockSize != 0)
+               {
+                    throw new ArgumentException("Padding not supported");
+               }
+
+               int n = 2 * (1 + input.Length / blockSize);
+               
+               int V = (n - 1) * 6;
+
+               buffer = new byte[input.Length - inOff + blockSize];
+               Array.Copy(input, inOff, buffer, 0, input.Length - inOff);
+               //Console.WriteLine(Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(buffer));
+
+               
+
+               byte[] B = new byte[blockSize / 2];
+               Array.Copy(buffer, 0, B, 0, blockSize / 2);
+               //Console.WriteLine("B0: "+ Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(B));
+               
+               
+               List<byte[]> bTemp = new List<byte[]>();
+              
+               int bHalfBlocksLen = buffer.Length - blockSize  / 2;
+               int bufOff = blockSize / 2;
+               while (bHalfBlocksLen != 0)
+               {                    
+                    byte[] temp = new byte[blockSize / 2];
+                    Array.Copy(buffer, bufOff, temp, 0, blockSize / 2);
+                    //Console.WriteLine(Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(buffer));
+                    //Console.WriteLine(buffer.Length);
+                    //Console.WriteLine("b: " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(temp));
+                    
+                    bTemp.Add(temp);
+
+                    bHalfBlocksLen -= blockSize / 2;
+                    bufOff += blockSize / 2;
+               }
+
+                                       
+
+               for (int j = 0; j < V; j++)
+               {
+                    Array.Copy(B, 0, buffer, 0, blockSize / 2);
+                    Array.Copy(bTemp[0], 0, buffer, blockSize / 2, blockSize / 2);
+
+                    engine.ProcessBlock(buffer, 0, buffer, 0);
+                                        
+                    intTobytes(j + 1, intArray, 0);
+                    for (int byteNum = 0; byteNum < BYTES_IN_INTEGER; byteNum++)
+                    {
+                         buffer[byteNum + blockSize / 2] ^= intArray[byteNum];
+                    }
+
+                    Array.Copy(buffer, blockSize / 2, B, 0, blockSize / 2);
+                    
+                    for (int i = 2; i < n; i++)
+                    {                        
+                         Array.Copy(bTemp[i - 1], 0, bTemp[i - 2], 0, blockSize / 2);
+                    }
+
+                    Array.Copy(buffer, 0, bTemp[n - 2], 0, blockSize / 2);
+
+                    //Console.WriteLine("B" + j.ToString() + ": " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(B));
+                    //Console.WriteLine("b: " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(bTemp[0]));
+                    //Console.WriteLine("b: " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(bTemp[1]));
+                    //Console.WriteLine("b: " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(bTemp[2]));
+
+                    //Console.WriteLine(Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(buffer));
+               }
+
+
+               Array.Copy(B, 0, buffer, 0, blockSize / 2);
+               bufOff = blockSize / 2;
+
+               for (int i = 0; i < n - 1; i++)
+               {
+                    Array.Copy(bTemp[i], 0, buffer, bufOff, blockSize / 2);
+                    bufOff += blockSize / 2;
+               }
+
+               return buffer;
+          }
+
+          public byte[] Unwrap(byte[] input, int inOff, int length)
+          {
+               if (forWrapping)
+               {
+                    throw new InvalidOperationException("not set for unwrapping");
+               }
+
+               if ((input.Length - inOff) % blockSize != 0)
+               {
+                    throw new ArgumentException("Padding not supported");
+               }
+
+               int n = 2 * input.Length / blockSize;
+
+               int V = (n - 1) * 6;
+
+               buffer = new byte[input.Length - inOff];
+               Array.Copy(input, inOff, buffer, 0, input.Length - inOff);
+                              
+               byte[] B = new byte[blockSize / 2];
+               Array.Copy(buffer, 0, B, 0, blockSize / 2);
+               //Console.WriteLine("B18: " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(B));
+               
+               List<byte[]> bTemp = new List<byte[]>();
+
+               int bHalfBlocksLen = buffer.Length - blockSize / 2;
+               int bufOff = blockSize / 2;
+               while (bHalfBlocksLen != 0)
+               {
+                    byte[] temp = new byte[blockSize / 2];
+                    Array.Copy(buffer, bufOff, temp, 0, blockSize / 2);
+                    //Console.WriteLine(Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(buffer));
+                    //Console.WriteLine(buffer.Length);
+                    //Console.WriteLine("b: " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(temp));
+
+                    bTemp.Add(temp);
+
+                    bHalfBlocksLen -= blockSize / 2;
+                    bufOff += blockSize / 2;     
+               }
+
+
+               for (int j = 0; j < V; j++)
+               {
+                    Array.Copy(bTemp[n - 2], 0, buffer, 0, blockSize / 2);
+                    Array.Copy(B, 0, buffer, blockSize / 2, blockSize / 2);
+                    intTobytes(V - j, intArray, 0);
+                    for (int byteNum = 0; byteNum < BYTES_IN_INTEGER; byteNum++)
+                    {
+                         buffer[byteNum + blockSize / 2] ^= intArray[byteNum];
+                    }
+
+                    //Console.WriteLine(Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(buffer));
+
+                    engine.ProcessBlock(buffer, 0, buffer, 0);
+
+                    //Console.WriteLine(Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(buffer));
+                                        
+                    Array.Copy(buffer, 0, B, 0, blockSize / 2);
+
+                    for (int i = 2; i < n; i++)
+                    {
+                         Array.Copy(bTemp[n - i - 1], 0, bTemp[n - i], 0, blockSize / 2);
+                    }
+
+                    Array.Copy(buffer, blockSize / 2, bTemp[0], 0, blockSize / 2);
+
+                    //Console.WriteLine("B" + (V - j - 1).ToString() + ": " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(B));
+                    //Console.WriteLine("b: " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(bTemp[0]));
+                    //Console.WriteLine("b: " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(bTemp[1]));
+                    //Console.WriteLine("b: " + Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(bTemp[2]));
+
+                    //Console.WriteLine(Org.BouncyCastle.Utilities.Encoders.Hex.ToHexString(buffer));
+               }
+
+
+               Array.Copy(B, 0, buffer, 0, blockSize / 2);
+               bufOff = blockSize / 2;
+
+               for (int i = 0; i < n - 1; i++)
+               {
+                    Array.Copy(bTemp[i], 0, buffer, bufOff, blockSize / 2);
+                    bufOff += blockSize / 2;
+               }
+
+               
+               Array.Copy(buffer, buffer.Length - blockSize, checkSumArray, 0, blockSize);
+
+
+               if (!Arrays.AreEqual(checkSumArray, zeroArray))
+               {
+                    throw new InvalidCipherTextException("checksum failed");
+               }
+               else
+               {
+                    Array.Resize(ref buffer, buffer.Length - blockSize);
+               }
+
+               return buffer;
+          }
+
+          //int to array of bytes
+          private static void intTobytes(
+                    int num,
+                    byte[] outBytes,
+                    int outOff)
+          {
+               outBytes[outOff + 3] = (byte)(num >> 24);
+               outBytes[outOff + 2] = (byte)(num >> 16);
+               outBytes[outOff + 1] = (byte)(num >> 8);
+               outBytes[outOff] = (byte)num;
+          }
+     }
+}